1200134021543 has 2 divisors, whose sum is σ = 1200134021544. Its totient is φ = 1200134021542.

The previous prime is 1200134021531. The next prime is 1200134021573. The reversal of 1200134021543 is 3451204310021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200134021543 - 2⁸ = 1200134021287 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200134021573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600067010771 + 600067010772.

It is an arithmetic number, because the mean of its divisors is an integer number (600067010772).

Almost surely, 2^{1200134021543} is an apocalyptic number.

1200134021543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200134021543 is an equidigital number, since it uses as much as digits as its factorization.

1200134021543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1200134021543 its reverse (3451204310021), we get a palindrome (4651338331564).

The spelling of 1200134021543 in words is "one trillion, two hundred billion, one hundred thirty-four million, twenty-one thousand, five hundred forty-three".